mapFields.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2016-2025 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::functionObjects::mapFields
 
Group
    grpFieldFunctionObjects
 
Description
    Maps input fields from local mesh to secondary mesh at runtime.
 
    Operands:
    \table
      Operand      | Type                       | Location
      input        | {vol,surface}<Type>Field   | <time>/inputField
      output file  | -                          | -
      output field | {vol,surface}<Type>Field | <time>/outputField
    \endtable
 
    where \c Type can be one of:
        \c Scalar, \c Vector, \c SphericalTensor, \c SymmTensor, or \c Tensor.
 
Usage
    Minimal example by using \c system/controlDict.functions:
    \verbatim
    mapFieldsFO
    {
        // Mandatory entries
        type            mapFields;
        libs            (fieldFunctionObjects);
        fields          <wordList>;  // (<field1> <field2> ... <fieldN>);
        mapRegion       <word>;      // coarseMesh;
        mapMethod       <word>;      // cellVolumeWeight;
        consistent      <bool>;;
 
        // Optional entries
        patchMapMethod  direct;  // AMI-related entry
 
        // Conditional entries
 
        // when consistent=false
 
            // Manual: createPatchMap false;
            // patchMap        (<patchSrc> <patchTgt>);
            // cuttingPatches  (<patchTgt1> <patchTgt2> ... <patchTgtN>);
 
            // Automatic: createPatchMap true;
            // Creates the patchMap and cuttingPatches automatically
 
        // Inherited entries
        ...
    }
    \endverbatim
 
    where the entries mean:
    \table
      Property     | Description                        | Type | Reqd  | Deflt
      type         | Type name: mapFields               | word |  yes  | -
      libs         | Library name: fieldFunctionObjects | word |  yes  | -
      fields       | Names of operand fields            | wordList |  yes  | -
      mapRegion    | Name of region to map to           | word |  yes  | -
      mapMethod    | Mapping method                     | word |  yes  | -
      consistent   | Mapping meshes have consistent boundaries | bool  | yes | -
      patchMapMethod | Patch mapping method for AMI cases | word |  no  | -
      createPatchMap | Automatically create patchMap and cuttingPatches|  <!--
                 --> | bool | no | -
      patchMap     | Mapping between coincident source and target patches <!--
               --> | wordHashTable | no | -
      cuttingPatches | Target patches cutting the source domain <!--
                 --> | wordList | no | -
    \endtable
 
    Options for the \c mapMethod entry:
    \verbatim
      direct
      mapNearest
      cellVolumeWeight
      correctedCellVolumeWeight
    \endverbatim
 
    Options for the \c patchMapMethod entry:
    \verbatim
      nearestFaceAMI
      faceAreaWeightAMI
    \endverbatim
 
    The inherited entries are elaborated in:
      - \link functionObject.H \endlink
 
SourceFiles
    mapFields.C
    mapFieldsTemplates.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_functionObjects_mapFields_H
#define Foam_functionObjects_mapFields_H
 
#include "fvMeshFunctionObject.H"
#include "volFieldsFwd.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
class meshToMesh;
 
namespace functionObjects
{
 
/*---------------------------------------------------------------------------*\
                          Class mapFields Declaration
\*---------------------------------------------------------------------------*/
 
class mapFields
:
    public fvMeshFunctionObject
{
    // Private Data
 
        //- Input dictionary
        dictionary dict_;
 
        // //- Locally cached map region mesh (map to this mesh)
        // autoPtr<fvMesh> mapRegionPtr_;
 
        //- Mesh-to-mesh interpolation
        autoPtr<meshToMesh> interpPtr_;
 
        //- List of field names to interpolate
        wordRes fieldNames_;
 
 
    // Private Member Functions
 
        //- On-the-fly lookup or load of the map region mesh
        const fvMesh& lookupMapRegion() const;
 
        //- Helper function to create the mesh-to-mesh interpolation
        void createInterpolation
        (
            const dictionary& dict,
            const fvMesh& meshTarget,
            const fvMesh& mapRegion
        );
 
        // //- Helper function to create the mesh-to-mesh interpolation
        // void createInterpolation(const dictionary& dict);
 
        //- Helper function to evaluate constraint patches after mapping
        template<class Type>
        void evaluateConstraintTypes
        (
            GeometricField<Type, fvPatchField, volMesh>& fld
        ) const;
 
        //- Helper function to map the <Type> fields
        template<class Type>
        bool mapFieldType() const;
 
        //- Helper function to write the <Type> fields
        template<class Type>
        bool writeFieldType() const;
 
 
public:
 
    //- Runtime type information
    TypeName("mapFields");
 
 
    // Constructors
 
        //- Construct from name, Time and dictionary
        mapFields
        (
            const word& name,
            const Time& runTime,
            const dictionary& dict
        );
 
        //- No copy construct
        mapFields(const mapFields&) = delete;
 
        //- No copy assignment
        void operator=(const mapFields&) = delete;
 
 
    //- Destructor
    virtual ~mapFields() = default;
 
 
    // Member Functions
 
        //- Read the function-object dictionary
        virtual bool read(const dictionary& dict);
 
        //- Execute the function-object operations
        virtual bool execute();
 
        //- Write the function-object results
        virtual bool write();
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace functionObjects
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "mapFieldsTemplates.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //